package com.dz.usersystem.util;

import cn.hutool.core.util.IdUtil;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.dz.usersystem.config.AlipayConfig;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class AliPay {
    public void aliPay(HttpServletResponse response, HttpServletRequest request, String count, String message) throws IOException {
        response.setContentType("text/html;charset=UTF-8");


        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
        String simpleUUID = IdUtil.simpleUUID();
        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = simpleUUID;
        //付款金额，必填
        String total_amount = count;
        //订单名称，必填
        String subject = message;
        //商品描述，可空
        String body = message;

        alipayRequest.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
                + "\"total_amount\":\"" + total_amount + "\","
                + "\"subject\":\"" + subject + "\","
                + "\"body\":\"" + body + "\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //请求
        String result;
        try {
            result = alipayClient.pageExecute(alipayRequest).getBody();
            response.setContentType("text/html;charset=" + AlipayConfig.charset);
            response.getWriter().write(result);//直接将完整的表单html输出到页面
            response.getWriter().flush();
            response.getWriter().close();
        } catch (AlipayApiException e) {
            e.printStackTrace();
            response.getWriter().write("捕获异常出错");
            response.getWriter().flush();
            response.getWriter().close();
        }

    }
}
